The first three terms of a geometric progression are 2x, 4x + 14 and 20x - 14. Find the sum of the first ten terms.
If 4, 2, 5, and 18 are added respectively to the first four terms of an arithmetic progression, the resulting series is a geometric progression. What is the common difference of the arithmetic progression?
The 4th term of a geometric progression is 6 and the 10th term is 384.
Part 1: What is the common ratio of the G.P.?
Part 2: What is the first term?
Part 3: What is the seventh term?